E116
High 24V
This code typically points to
- 24V control power above Lennox stated 18 to 30 VAC range
- Improper line voltage feeding equipment transformer
Next checks to confirm
- Measure 24V control power
- Check line voltage feeding the equipment transformer
- Correct voltage so control senses proper range
Escalation
Control flags overvoltage until corrected
Reset behavior
Clears when the control senses proper voltage.
Service Soon
Schedule repair